An Abnormal Increase of Fatigue Life with Dwell Time during Creep-Fatigue Deformation for Directionally Solidified Ni-Based Superalloy DZ445

Published on Mar 26, 2018in High Temperature Materials and Processes0.677
· DOI :10.1515/HTMP-2016-0079
Biao Ding1
Estimated H-index: 1
(SHU: Shanghai University),
Biao Ding1
Estimated H-index: 1
+ 2 AuthorsYongchun Liang5
Estimated H-index: 5
(EPRI: Electric Power Research Institute)
📖 Papers frequently viewed together
7 Authors (Biao Ding, ..., Z. M. Ren)
2 Citations
2 Citations
3 Authors (A. U. Haq, ..., D. Q. Shi)
1 Citations
#1Guanyi Chen (TJU: Tianjin University)H-Index: 3
#1Guang Chen (TJU: Tianjin University)H-Index: 70
Last. Chen Xingyu (TJU: Tianjin University)H-Index: 3
view all 5 authors...
Abstract Total strain-controlled low cycle fatigue (LCF) tests of a nickel based superalloy were performed at 650 °C. Various hold times were introduced at the peak tensile strain to investigate the high-temperature creep-fatigue interaction (CFI) effects under the same temperature. A substantial decrease in fatigue life occurred as the total strain amplitude increased. Moreover, tensile strain holding further reduced fatigue life. The saturation phenomenon of holding effect was found when the h...
66 CitationsSource
#1R. Hormozi (Imperial College London)H-Index: 3
#2Farid R. Biglari (AUT: Amirkabir University of Technology)H-Index: 13
Last. Kamran Nikbin (Imperial College London)H-Index: 26
view all 3 authors...
Abstract Fully-reversed, strain-controlled isothermal tests were conducted on the Type 316FR at 650 °C for the strain ranges of Δɛ = ±0.4%, ±0.8%, ±1.0% and ±1.2%. A constitutive model based on isotropic and nonlinear kinematic hardening rules was used to replicate numerically the cyclic structural behaviour of the material until stabilisation. Finally to demonstrate the damage initiation and the damage evolution, a hysteresis energy-based phenomenological model was implemented in a user subrout...
16 CitationsSource
#1Xiang Chen (UIUC: University of Illinois at Urbana–Champaign)H-Index: 11
#2Zhiqing Yang (CAS: Chinese Academy of Sciences)H-Index: 26
Last. James F. Stubbins (UIUC: University of Illinois at Urbana–Champaign)H-Index: 27
view all 6 authors...
Abstract Strain-controlled low cycle fatigue (LCF) and creep-fatigue testing of Ni-based alloy 230 were carried out at 850 °C. The material creep-fatigue life decreased compared with its low cycle fatigue life at the same total strain range. Longer hold time at peak tensile strain further reduced the material creep-fatigue life. Based on the electron backscatter diffraction, a novel material deformation characterization method was applied, which revealed that in low cycle fatigue testing as the ...
15 CitationsSource
#1Xianhua Chen (Chongqing University)H-Index: 22
#1Xianhua Chen (Chongqing University)H-Index: 11
Last. Dingfei Zhang (Chongqing University)H-Index: 23
view all 6 authors...
The microstructure and mechanical properties of ZK60 Mg alloy were investigated under different solution treatments and artificial aging conditions. When as-cast ZK60 alloy was solution treated at 400℃ for 10 h and artificially aged at 150℃, the volume fraction of precipitates increased with the aging time up to 30 h. When the as-cast ZK60 alloy was solution treated at 400℃ for 10 h and artificially aged at 200℃ for 15-20 h, the volume fraction of precipitates reached a peak value. Tensile test ...
24 CitationsSource
#1Duoqi Shi (Beihang University)H-Index: 16
#2Jinlong Liu (Beihang University)H-Index: 4
Last. Jingke Wang (Beihang University)H-Index: 4
view all 5 authors...
Abstract The low cycle fatigue (LCF) and creep–fatigue tests have been conducted with directionally solidified nickel-based superalloy DZ125 at 850 and 980 °C to study the creep–fatigue interaction behavior of alloy with different dwell time. On the average, the life of creep–fatigue tests are about 70% less than the life of LCF tests under the same strain range at 850 °C. The life of creep–fatigue decreases as dwell time increases, but the life of this alloy was almost unchanged when dwell time...
27 CitationsSource
Abstract This study reports on the creep–fatigue interaction of the oxide dispersion strengthened Ni-base superalloy PM 1000. Fully reversed symmetrical push–pull isothermal fatigue, thermomechanical fatigue (TMF), slow-fast and tensile hold time tests were conducted in the temperature range from 450 to 1050 °C. TMF tests resulted in unexpectedly low fatigue lives. Grain boundary cavitation observed in the in-phase TMF tests indicated that creep damage plays an important role under TMF loading c...
12 CitationsSource
#1Vani Shankar (RRC: Indira Gandhi Centre for Atomic Research)H-Index: 21
#2M. Valsan (RRC: Indira Gandhi Centre for Atomic Research)H-Index: 22
Last. S.D. Pathak (Indian Institute of Technology Madras)H-Index: 11
view all 6 authors...
Abstract In the present paper, influence of hold time on the high temperature low cycle fatigue (LCF) behavior of modified 9Cr–1Mo ferritic steel in the normalized and tempered condition is addressed. Total axial strain controlled LCF tests at 873 K with hold times at peak strain up to 10 min in tension and compression were carried out employing total strain amplitude of ±0.6%. The alloy in general, showed a gradual and continuous softening regime. Fatigue life was found to decrease with increas...
150 CitationsSource
#1Y.L. Lu (UT: University of Tennessee)H-Index: 6
#2L.J. Chen (UT: University of Tennessee)H-Index: 11
Last. Dwaine L. Klarstrom (Haynes International)H-Index: 21
view all 11 authors...
Total strain-controlled low-cycle-fatigue tests with and without hold times were performed at temperatures ranging from 816°C to 982°C in a laboratory air on a nickel-based superalloy, HASTELLOY X. The influence of hold times on the cyclicstress response and fatigue life was studied. At the temperatures considered, the alloy exhibited initial cyclic hardening, followed by a saturated cyclic-stress response or cyclic softening under low-cycle fatigue without hold times. For low-cycle-fatigue test...
63 CitationsSource
#1Hans-Peter MeurerH-Index: 1
#2Günter Gnirss (BBC: Brown, Boveri & Cie)H-Index: 2
Last. Georg UllrichH-Index: 2
view all 6 authors...
For the development of a high-temperature gascooled reactor that is to be operated at temperatures up to 950/sup 0/C, the low-cycle fatigue (LCF) as well as the high-cycle fatigue (HCF) behavior of several hightemperature alloys have been evaluated. The tests, performed between room temperature and 950/sup 0/C, include the influence of the environment, hold times, and strain rate in the case of LCF behavior and of mean stresses in the case of HCF behavior. At high strain ranges, alloys with a hi...
28 CitationsSource
#1Stephen D. Antolovich (UC: University of Cincinnati)H-Index: 22
#2S. LiuH-Index: 1
Last. R. Baur (GE: General Electric)H-Index: 1
view all 3 authors...
Low cycle fatigue of Rene 80 was studied at 871 and 982 °C. It was found that when the data were represented on the basis of plastic strain, the life increased with decreasing frequency and imposition of a 90 s hold at maximum strain. Transmission electron microscopy studies showed that the ′ coarsened and an interfacial array of edge dislocations developed. The density of dislocations in the matrix was very low. Light optical microscopy revealed that cracks generally inititiated at oxide spikes...
124 CitationsSource
Cited By4
#1Biao Ding (SHU: Shanghai University)H-Index: 3
#2Weili Ren (SHU: Shanghai University)H-Index: 18
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
view all 12 authors...
Abstract High total strain-controlled creep-fatigue tests of 1.8% were performed for a directionally-solidified Ni-based superalloy, DZ445, at 900 °C in air. Dwell times of 0, 2, and 5 min. were introduced at the tensile peak strain for each cycle. Experimental results show a decrease in fatigue life with increasing dwell time. The significant cyclic softening is observed after the application of the dwell time. The mean compressive stress and large plastic-strain accumulation are produced due t...
#1Zhen Wang (THU: Tsinghua University)H-Index: 2
#2Wenwang Wu (SJTU: Shanghai Jiao Tong University)H-Index: 1
Last. X. S. Li (THU: Tsinghua University)H-Index: 14
view all 4 authors...
Abstract Creep-fatigue interaction behavior of nickel-based single crystal superalloy was studied in an in-situ SEM platform at 900 °C. Dwell times of 15, 30, 60, 90, 120 s were introduced at the tensile peak stress of each cycle. Experimental results showed that the life cycles firstly decreased rapidly then slightly increased with the increasing dwell time, which was explained by the accumulated inelastic strain. Dislocation microstructure and inelastic strain were correlated for different dwe...
2 CitationsSource
#1Biao Ding (SHU: Shanghai University)H-Index: 3
#2Weili Ren (SHU: Shanghai University)H-Index: 18
Last. Yunbo Zhong (SHU: Shanghai University)H-Index: 20
view all 8 authors...
Abstract Based on the tensile stress-dominated (strain ratio, R = e min / e max = 0 ) and compressive stress-dominated (R = ∞) low-cycle fatigue (LCF) of a first-generation directionally solidified Ni-based superalloy DZ445 at 900 °C, the paper investigated the contribution of tensile stress and compressive stress to the damage during LCF and creep-fatigue deformation. The results demonstrated that the fatigue life in the case of tensile stress-dominated LCF is about half of that in compressive ...
2 CitationsSource
#1Biao DingH-Index: 3
#2Weili RenH-Index: 18
Last. Z. M. RenH-Index: 3
view all 7 authors...
2 CitationsSource
#1Biao Ding (SHU: Shanghai University)H-Index: 3
#2Weili Ren (SHU: Shanghai University)H-Index: 18
Last. Jianbo Yu (SHU: Shanghai University)H-Index: 11
view all 5 authors...
Abstract Total strain-controlled creep-fatigue tests were performed for a directionally solidified Ni-based superalloy at 850 °C in air. Dwell times of 0, 1, 2, 3, 5, and 8 min were introduced at the tensile peak for each cycle. The results demonstrated that the fatigue life firstly decreased and then slightly increased with increasing dwell time. The fatigue life showed a minimum at a dwell time of 3 min. The initial softening rate was faster than the subsequent softening rate when dwell times ...
7 CitationsSource